WO1994020032A1 - Dispositif d'evacuation de fumee pour des dispositifs produisant de la fumee - Google Patents

Dispositif d'evacuation de fumee pour des dispositifs produisant de la fumee Download PDF

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Publication number
WO1994020032A1
WO1994020032A1 PCT/US1994/002406 US9402406W WO9420032A1 WO 1994020032 A1 WO1994020032 A1 WO 1994020032A1 US 9402406 W US9402406 W US 9402406W WO 9420032 A1 WO9420032 A1 WO 9420032A1
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WO
WIPO (PCT)
Prior art keywords
smoke
tubular housing
vortex
electrosurgical device
suction
Prior art date
Application number
PCT/US1994/002406
Other languages
English (en)
Inventor
Nadiv Shapira
Original Assignee
Nadiv Shapira
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nadiv Shapira filed Critical Nadiv Shapira
Priority to AU63976/94A priority Critical patent/AU6397694A/en
Publication of WO1994020032A1 publication Critical patent/WO1994020032A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1402—Probes for open surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration
    • A61B2218/008—Aspiration for smoke evacuation

Definitions

  • the present invention relates to improvements in smoke removal and, more particularly, to a smoke evacuating device for use with surgical electrocautery devices.
  • Hand-held electrosurgical instruments such as electrocautery or laser surgical devices are used in many branches of surgery for the bloodless cutting of tissue, and for the cauterizing of vessels to stop bleeding.
  • the localized heat generated by the electrical discharge causes large amounts of noxious smoke to be produced. This high temperature smoke rises rapidly from the point of the cautery instrument.
  • the smoke may contain carcinogenic elements, potentially harmful to the operating room staff.
  • the smoke is sometimes produced in such volume that the surgeon's view of the operative field is obscured.
  • the anatomy causes the smoke to be trapped. Such a case is the dissection of the left internal mammary artery for subsequent coronary artery bypass grafting.
  • the internal mammary artery lies beneath the left rib cage, several centimeters to the left of the midline incision.
  • the smoke generated during the dissection of the vessel tends to collect in the chest cavity. It is therefore desirable to provide a smoke collection system to remove the nuisance, smell and potential hazard
  • a number of electrosurgical devices are available which do not include any suction capabilities for removing smoke from the operating area.
  • other U.S. patents disclose devices which do include suction capabilities.
  • U.S. Patent Nos. 2,275,167; 3,266,492; and 3,906,955 disclose such devices. These devices include a tube connected to a source of vacuum which runs parallel to the cautery blade.
  • U.S. Patent No. 4,362,160 discloses an endoscope which includes passages for feeding in and drawing off scavenging or flushing liquid which extends longitudinally behind the cutting or coagulating loop.
  • U.S. Patent Nos. 2,808,833; 2,888,928; and 4,686,981 include suction means for the express purpose of withdrawing excess blood prior to coagulating the remaining blood.
  • U.S. Patent No. 2,888,928 discloses a coagulating surgical instrument which includes a plurality of openings disposed at right angles with respect to the longitudinal axis of the cautery tip. Therefore, the suction operates to clear an area which is not immediately adjacent to the coagulating instrument.
  • U. S. Patent No. 5,181,916 discloses a surgical probe and smoke eliminator that incorporates either an annular suction port for laminar air flow intake or a series of circumferentially arranged nozzle orifices configured to create a vortex in the immediate vicinity upstream of distal end of the probe.
  • the nozzle orifices are angularly arranged, as opposed to the longitudinal arrangement of the annular suction port, to induce rotary motion of the smoke in the space around the probe target area.
  • U. S. Patent No. 4,963,134 discloses a laser surgery plume evacuator with an aspirator.
  • the evacuator is not connected to a standard wall vacuum receptacle in an operating room (OR). Instead, the evacuator is connected to a self-contained portable unit that includes a source of vacuum.
  • the evacuator includes an intake nozzle which sucks in the plume but which does not form part of the surgical probe. Therefore, the nozzle must be separately handled and may interfere with the surgeon's manipulations of the probe.
  • the smoke created by these devices must also be efficiently removed from the surgical field because it obscures the surgeon's view of the surgical field and is an irritant to the surgeon's eyes.
  • the smoke is odorous and interferes with the surgeon's concentration during the operation.
  • the present invention improves smoke removability by providing a vortex creating portion in the form of a helical member at the intake of the smoke removing tube.
  • Webster's New Collegiate Dictionary defines a vortex as "a mass of fluid having a whirling or circular motion tending to form a cavity or vacuum in the center of the circle, and to draw toward this cavity or vacuum bodies subject to its action.”
  • the creation of the vortex suction causes smoke to be pulled in from a wider area, from a greater distance, and at a quicker rate than that available using an unaltered smoke removing tube.
  • a device for removing smoke from the air near a smoke generator comprising a hollow tube for evacuating the smoke, a tubular housing including vortex means for creating a vortex at an entrance end of the tubular housing, and an exit end of the tubular housing adapted to be connected to one end of the hollow tube, another end of the hollow tube being adapted to be connected to a first suction means for creating suction to remove the smoke from the air near the smoke generator.
  • Second suction means selectively increases the suction and vortex at the entrance to the tubular housing.
  • the smoke generator may be an electrosurgical device.
  • An electrosurgical device which includes a cutting and cauterizing means in electrical communication with an external power source, a tube having a vortex end and adapted to be connected to a vacuum generator for removing smoke created with the cutting and cauterizing means from an adjacent immediate area, and means for turning on and off the vacuum suction device located at a distance spaced from the cutting and cauterizing end of the device.
  • Fig. 1 is a plan view of an electrosurgical device including the smoke removal device according to a first embodiment of the present invention
  • Fig. la is a plan view of a prior art electrosurgical laser tipped cutting instrument as an example of the laser type hand-held prior art electrosurgical instruments listed in the "BACKGROUND OF THE INVENTION" section above.
  • Fig. 2 is a plan view of an electrosurgical device including the smoke removal device according to a second embodiment of the present invention
  • Fig. 3 is a plan view of a third embodiment of the present invention.
  • Figs. 4A, 4B, and 4C are a set of cross-sectional views of different vortex creating tubes which can be used in accordance with the present invention, taken along the line III-III of Fig. 1;
  • Fig. 5 is a plan view of a fourth embodiment of the present invention in which the tip of the electrocautery device and the vortex tip of the suction tube are roundly curved.;
  • Fig. 6 is a block diagram of three orifice diameters used to demonstrate the efficiency of the vortex tube according to the present invention.
  • Fig. 7A illustrates the circuit used to measure the efficiency of the vortex tube
  • Fig. 7B illustrates the critical distance measured using the vortex tube
  • Fig. 8 is a graph of the results of the experiment conducted using the equipment of Figs. 6 and 7.
  • Fig. 9 shows a plot of critical distance measured against spiral density.
  • Fig. 10A shows an experiment arrangement including the location of distance I "IdJII
  • Fig. 10B is a detailed schematic view of the orifice block and smoke source with distance "d";
  • Fig. 11 is a block diagram of three orifice diameters used to demonstrate the efficiency of the vortex tube
  • Fig. 12A is another schematic view showing a distance "d" test conducted with the three orifice blocks shown in Figure 11;
  • Fig. 12B is a detailed schematic view of a single orifice, distance "d" and a vacuum connection of the apparatus of Figure 12A;
  • Fig. 13 is a plot of critical distance against a spiral length where the turn density is one turn per 25 millimeters;
  • Fig. 14 is a side elevational view of an externally fluted central electrode in accordance with another embodiment of the invention.
  • Fig. 15 is a longitudinal section of a cylindrical probe housing incorporating the central electrode shown in Fig. 14;
  • Fig. 16 is a diagramatic representation, in side elevation of an internally fluted cylindrical probe housing in accordance with a further embodiment of the invention.
  • Fig. 17 is an end view of the probe shown in Fig. 16;
  • Fig. 18 is a schematic of a system set-up using the probes of the present invention in a typical operating room (OR) arrangement and using a vacuum booster to selectively enhance the evacuation capabilities of the surgical probe;
  • Fig. 19 is an electrical schematic that can be used with the arrangement of Fig. 18.
  • Fig. 1 schematically shows a typical electrosurgical cutting or coagulating device 12.
  • One embodiment of the present invention is one in which the smoke remover device 10 is removably attached to device 12.
  • the remover 10 can be attached to the electrosurgical device using various types of attaching means 14 such as mounting brackets or the like.
  • the electrosurgical device 12 receives power from a power source (not shown) through plug 16, which can be adapted to fit various power sources, and then through electrical cord 18 to the device 12.
  • the smoke remover 10 consists of a hollow tubular base 30 and a vortex creating member 25 attached to the base 30.
  • Tube 21 and base 30 may be constructed of plastic.
  • the vortex creating member 25 includes a twisted piece of material 20, for example, stainless steel fit within the tube 21. As an example, a section of drill bit wedged within an appropriately sized tube will provide the desired effect, the vortex creating member 25 is removably inserted onto the end of base 30.
  • a set of interchangeable tips including the straight vortex tip shown in the present embodiment in Fig. 1 may be provided.
  • the various tips are interchangeable as the situation requires to enable the operating surgeon to clear away the maximum amount of smoke.
  • Some of the various tips that could be used include the straight vortex tip 20 of the embodiment shown in Fig. 1, a sharply or roundly curved vortex tip such as shown in Fig. 5, and various other tips. Additionally, various tips may be provided in which the twisted material 20 is of different lengths.
  • Fig. 1A shows a prior art laser tipped cutting instrument as an example of the laser type hand-held prior art electrosurgical instruments listed in the "BACKGROUND OF THE INVENTION" section above.
  • This prior art device is shown having a laser beam 26A and a laser source 26B which function to permit bloodless cutting of tissues in an equivalent manner to prior art electrocautery devices also listed with such prior art hand-held electrosurgical instruments.
  • FIGs. 2 and 3 An alternative embodiment of the present invention is shown in Figs. 2 and 3.
  • the vortex tip 120 concentrically surrounds the base 126 of the cutting blade 26.
  • the vortex tip 120 can be either removably or permanently attached to the electrosurgical device 112. If the tip 120 is removable then it may be part of a set of interchangeable tips which can be used as the situation requires.
  • a tube 130 is shown coming out of the back of the electrosurgical device 112 to carry the removed smoke to hose 24, which meets tube 130 at intersection joint 22 (not shown). Of course, the tube 130 could be eliminated with the hose 24 connecting directly to the smoke removal device 120 or the back of the electrosurgical device 112.
  • Fig. 4 shows cut-away cross-sections of three different vortex creating members, along the line III-III of Fig. 1, which could be used in the present invention.
  • the member may be formed in a variety of different shapes, length, and sizes.
  • the piece 20 within the tip may be one-quarter, one-half or one inch long.
  • a different number of vanes, fins or blades may be provided in different tips.
  • the member may be either a single or a double helix.
  • Fig. 4A has a single vortex creating opening and would be relatively easy and inexpensive to manufacture.
  • Figs. 4B and 4C includes two and three vanes, for creating two and three vortex creating openings, respectively and are more complicated and would thus be more expensive to manufacture.
  • Figs. 2 and 3 illustrate different helical configurations for the vortex member. Other variations of vortex creating members can be easily created and all are intended to be included in the present invention.
  • the smoke remover 10 system works in the following manner. As the heated cutting blade or electrode 26 of the electrosurgical device 12 makes contact with the patient, smoke is produced from the burning tissue. When the vortex tip 20 is attached to the smoke remover 10, the pressure differential created by the vortex causes increased circulation of the air and smoke just outside of the vortex. Because of the funnel or whirlpool effect created by the pressure differential, smoke can be sucked to the openings from between the vortex creating member and the inside of the tube in from a wider area, from a greater distance, and at a quicker rate.
  • the suction of the device 10 is continuous.
  • the suction can be applied even when the blade 26 is not cauterizing, therefore, a negative pressure exists around the blade prior to generation of any smoke and the smoke is never given an opportunity to accumulate at the point of surgery.
  • different vortex tips could be selected to maximize the benefits available using the vortex tip according to the present invention.
  • the straight vortex tip may provide the most benefit.
  • a venturi vortex tip having a tapered end may be the most efficient choice.
  • the cutting tip 26 is bent at an angle, the most efficient smoke removing tip might be the bent vortex tip.
  • the surgeon could, also change the tips for obtaining a vortex having a different strength depending on the length of the helical member. Since the surgeon can easily change tips on the smoke remover, the surgeon will quickly become familiar with which tip is most
  • the on-off switch for the electrocautery device is shown at 19 in Fig. 1. This is separate from the on-off for the suction.
  • the suction for the smoke remover 10 can be turned on using various types of valves such as valve 28 on the hose 24.
  • the valve 28 is preferably placed on the hose 24 a few feet away from the smoke remover 10 so that the physician can ask a nurse or another member of the support staff to turn the suction on and off, thus keeping his free hand available for other purposes.
  • the valve 28 could just as easily be placed on the smoke remover itself near the cutting edge although it is less desirable for the aforementioned reason.
  • the presence of the valve allows the surgeon to request that the suction be turned off when it is not required in order to eliminate the noise created by the suction source.
  • the second tip was designed to created a bernouli effect.
  • the last three tips were designed to generate a vortex suction.
  • the first experiment was done while the Bovie pencil was held straight up, and the suction tip perpendicular to the pencil, 1.5" above the pencil tip. In this position, the generated smoke climbed as a column along the pencil. When the suction tip was held very close to the pencil, there was a very efficient smoke clearance. As a matter of fact, the smoke could be clearly seen to divert abruptly from the pencil in a right angle towards, and opposite from, the suction tip. As the suction tip was slowly moved away from the pencil, the column of smoke initially continued to be cleared in a similar fashion, until a certain distance, in which part of the smoke was not cleared any more and rose upwardly.
  • This distance was always longer when the vortex tip was employed, by approximately 30 to 40%, when compared to the clearance distance of the non-vortex tip.
  • the distance was dependent on the amount of smoke generated. When high quantities of smoke were generated, the suction tip had to be held relatively closer in order to achieve a complete clearance, and visa versa. Yet, for any amount of smoke, the vortex tip was able to clear the smoke from a longer distance.
  • vortex suction effects the air surrounding the tip in both distance and diameter.
  • vortex suction is capable of creating a more effective suction by the same vacuum source.
  • the objective of this experiment was to determine the smoke removal efficiency for the following tip configurations:
  • a ' I.D. hole on the distal side of the acrylic block served to connect the vacuum source with the test orifice.
  • the sides of the orifice tips were at sharp right angles. It was estimated that the drills blocked approximately 40% of the orifice area.
  • V 6.35 mm
  • the circuit was set up per Fig. 7a.
  • a vacuum was drawn through 6.35 mm (%") tubing at a regulated 25 liters/minute gas flow rate.
  • the distal end of the tubing was attached to the orifice of interest and vacuum flow initiated.
  • Each orifice was tested without the drill first, then with the drill.
  • the smoke source (filtered cigarettes) was placed 6 cm inferior to the orifice and moved either towards or away from the vacuum. If no vacuum was applied, the smoke rose in a concentrated stream for approximately 10-12 cm and then progressively dissipated. Data was taken in both directions. Care was taken to avoid any interfering movement of air. A total of five samples were recorded for each parameter.
  • the "critical distance” was defined as the distance “d” (in mm) at which the entire (100%) smoke flow curved towards the vacuum source and was drawn into the vacuum orifice at an obvious right angle to the non-vacuum rising flow (see Fig. 7b).
  • the accuracy of the measurements was estimated to be ⁇ 2 mm.
  • the critical distance is the measure of the smoke removal efficiency.
  • a fourth set of tests were performed which used the large diameter orifice (6.35 mm) from Test 3 but varied the turn density of the insert. It concluded that a spiral density of 2 turns/25 mm has greater efficiency than a spiral density of 1 turn/25 mm.
  • the objective of this experiment was to determine the smoke removal efficiency for the following tip configurations: a) Vortex that has one (1) turn in 26 mm. b) Vortex that has one and one-half (1%) turns in 25 mm. c) Vortex that has two (2) turns in 25 mm.
  • Three vortex turn densities were constructed out of brass stock (V wide and 1/32" thick) to fit inside an acrylic block (machined for Test 3 described previously) to a depth of 25 mm.
  • the turns (per/25 mm) were one (1), one and one-half (1%) and two (2). All
  • the circuit was set up per Figure 10a.
  • a vacuum was drawn through 6.35 mm (V) tubing at a regulated 25 liters/minute gas flow rate.
  • the distal end of the tubing was attached to the orifice and vacuum flow initiated.
  • the smoke source (filtered cigarettes) was placed 6 cm inferior to the orifice and moved towards the vacuum. If no vacuum was applied, the smoke rose in a concentrated stream for approximately 10-12 cm and then progressively dissipated. Care was taken to avoid any interfering movement of air. A total of five samples were recorded for each spiral.
  • the "critical distance” was defined as the distance “d” (in mm) at which the entire (100%) smoke flow was drawn into the vacuum orifice at an obvious right angle to the non-vacuum rising flow (see Figure 10b).
  • the accuracy of the measurements was estimated to be ⁇ 2 mm.
  • the "starting distance” was defined as the distance “d” (in mm) at which any smoke flow was drawn into the vacuum orifice.
  • the accuracy of these measurements was estimated to be ⁇ 3 mm.
  • the difference between the critical distance and the starting distance did not become significantly greater or smaller with an increase in turn density.
  • a fifth set of tests were performed which compared three orifices of constant diameter (again 6.35 mm) and constant turn density (1 turn/25 mm), but of increasing spiral length. The results show that a longer (75 mm) length yields greater efficiency than a shorter length (25 mm).
  • the objective of this set of tests was to determine the smoke removal efficiency for the following brass spiral tip configurations: a) Vortex that has one (1) turn in 25 mm and is 25 mm in length. b) Vortex that has one (1) turn in 25 mm and is 50 mm in length. c) Vortex that has one (1) turn in 25 mm and is 75 mm in length.
  • increasing the length of the vortex inducing insert showed significantly greater smoke removal. There was an 26.9% increase in efficiency when the length was increased from 25 mm to 75 mm.
  • the circuit was set up per Figure 12a.
  • a vacuum was drawn through 6.35 mm (V) tubing at a regulated 26 liters/minute gas flow rate.
  • the distal end of the tubing was attached to the orifice and vacuum flow initiated.
  • the smoke source (filtered cigarettes) was placed 6 cm inferior to the orifice and moved towards the vacuum. If no vacuum was applied, the smoke rose in a concentrated stream for approximately 10-12 cm and then progressively dissipated. Care was taken to avoid any interfering movement of air. A total of five samples were recorded for each spiral length.
  • the "critical distance” was defined as the distance “d” (in mm) at which the entire (100%) smoke flow was drawn into the vacuum orifice at an obvious right angle to the non-vacuum rising flow (see Figure 12b).
  • the accuracy of the measurements was estimated to be ⁇ 2 mm.
  • the "starting distance” was defined as the distance “d” (in mm) at which any smoke flow was drawn into the vacuum orifice.
  • the accuracy of these measurements was estimated to be ⁇ 3 mm.
  • the smoke removal device is discussed herein as being associated with an electrosurgical device such as a cauterizing pencil. However, it can clearly be used with any other smoke-generating surgical technique, such as coagulation or laser surgery. Moreover, it should be understood that the vortex smoke removal is adaptable for many other uses, such as smoke removal in restaurants, fire fighting and other industrial applications. For example, if a vortex creating member of the appropriate size were attached to the end of a large hose, the hose could be inserted into a burning building to remove the smoke at a faster rate, allowing fire fighters to enter the building without fear of collapsing from smoke inhalation. Additionally, if a vortex creating member were attached to a hose placed above a restaurant stove, the smoke could be cleared faster, allowing the chef to work safely and comfortably.
  • FIGs. 14-17 Additional constructions of the device according to the invention are illustrated in Figs. 14-17.
  • FIGs. 14 and 15 another embodiment of the invention is illustrated which utilizes an externally fluted central electrode 300, the major longitudinal length portion of which is in the form of an externally fluted body 302 defining a maximum external diameter 304.
  • the electrical conductor 18 which applies an electrical potential to the central electrode 302 can be connected to the proximal end of the electrode in any conventional manner or may be connected to an intermediate portion thereof, through a switch 19, at point 19' as shown.
  • the electrode tapers as shown to provide a vortex tip 306.
  • Fig. 14 and 15 another embodiment of the invention is illustrated which utilizes an externally fluted central electrode 300, the major longitudinal length portion of which is in the form of an externally fluted body 302 defining a maximum external diameter 304.
  • the electrical conductor 18 which applies an electrical potential to the central electrode 302 can be connected to the proximal end of the electrode in any conventional manner or may be connected to an
  • a mating cylindrical probe housing 308 which has an internal diameter of 304' which substantially corresponds to the maximum diameter 304 of the helical flutes, fins or vanes.
  • the diameters 304 and 304' are selected such that the flute on the body 302 can be received within the cylindrical probe housing with little clearance, so that the radially outermost extremeties of the flutes are substantially in contact or abuttment with the inner surface of the cylindrical housing,
  • the cylindrical housing 308 is connected to a vacuum hose 130 by means of suitable joining and sealing member 310.
  • the distal end of the housing 308b is advantageously tapered as shown.
  • the probe generally designated by the reference numeral 320, incorporates an internally fluted cylindrical probe housing.
  • the proximal end 320a of the housing is in fluid flow communication with and joined to vacuum hose 130 by means of conventional and joining member 310.
  • the distal end of the housing 320b is tapered to provide an opening 320c at a distal end which has a diameter smaller than the diameter of the housing.
  • the flutes, vanes, or fins are in the form of internal spirals 322. As with the other embodiments, one or more flutes, vanes or fins may be provided.
  • a metallic electrode 326 is attached to the probe housing 320 as shown and connected to a control console for application of electrical potential by means of electrical conductors 328.
  • a longitudinal axial bore or through opening 324 may be provided which extends the length of the housing.
  • the electrical conductors 328 may extend through this axial bore 324 to reach the electrode 326.
  • the axial bore 324 can also serve as an optical pathway for the laser beam.
  • the reference numeral 330 represents an operating room (OR) in which
  • an operating room table 332 Surgeons are typically positioned at 334 and a nurse might be positioned at 336. As is common in operating rooms, numerous facilities are available, including oxygen, a vacuum, and the like through wall-mounted ports.
  • the OR wall 338 is shown provided with a standard vacuum port 340 which is adapted to receive a standard connector 342which is universally used for accessing standard vacuum ports. Such standard connectors are well-known to those skilled in the art.
  • a vacuum booster 344 is provided for enhancing, on demand, the magnitude of the vacuum applied to the surgical probe 308.
  • the vacuum booster 344 is shown positioned in-line with the vacuum hose 130 between the surgical probe 308 and the standard vacuum port 340. While it is also possible with the present invention to utilize a stand-alone vacuum unit of the type disclosed in U.S. Patent Nos. 4,963,134 and 5,047,072, it is believed more advantageous to place the booster in line so that all hazardous gases and contaminents are exhausted to the standard vacuum port and not re-released into the operating room.
  • the vacuum booster 344 is shown connected to a console 346, which can also be the Bovie console typically used for surgical probes. However, this is not critical and a separate control can be used for the vacuum booster.
  • the control console 346 therefore, includes a conductor 348 coupled to the vacuum booster 344 as well as an electrical conductor 18 which is conventionally used to power the surgical probe.
  • sequences of operation and the levels of control of the surgical probe and the power booster may vary, and are not considered to be critical.
  • a motor 350 which forms part of the vacuum booster 344 is shown connected by means of a double pole (3521 and 352"),
  • the second pole 352" of the switch 352 is likewise provided with three contacts. Where the switch 352" is in position “a" or position "c", a suitable signal is provided at conductor 354 which activates the Bovi unit in a conventional manner and energizes the probe 308. However, when the switch 352" is in position "b", no signal is applied at the conductor 354 and the probe remains de-energized. It will be appreciated, therefore, that if the switches 352' and 352" are mechanically coupled or ganged together, and the positions "b" are the normal positions of the switch 19, the vacuum booster 344 and the probe are normally de-energized.
  • the switch can be rocked to position "a", in which case, as described, only the standard vacuum will be available at the probe. However, when additional suction is needed, the switch can be rocked into position "c" in which case both the probe as well as the vacuum booster are energized at a level selected by an adjustment of the power source 356. In this way, the surgeon has greater control over the evacuation of gases, noxious odors and other contaminents.

Abstract

Dispositif (10) d'extraction de fumée, applicable à de nombreux domaines, mais de préférence utilisé avec des dispositifs électro-chirurgicaux (12), et composé d'un tube creux permettant d'évacuer la fumée, d'un logement tubulaire comprenant un élément à tourbillon (25) qui crée un tourbillon à une extrémité d'entrée du logement tubulaire (30), ainsi qu'une extrémité de sortie du logement tubulaire, conçue pour être raccordée à une extrémité du tube creux (24). Une autre extrémité du tube creux est conçue pour être raccordée à un moyen d'aspiration (32) destiné à générer une aspiration afin d'extraire la fumée de l'air entourant le générateur de fumée. Une pompe à vide (344) est éventuellement utilisée pour renforcer l'aspiration et le tourbillon créés à l'entrée du logement tubulaire.
PCT/US1994/002406 1993-03-08 1994-03-07 Dispositif d'evacuation de fumee pour des dispositifs produisant de la fumee WO1994020032A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63976/94A AU6397694A (en) 1993-03-08 1994-03-07 Smoke evacuator for smoke generating devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/027,825 US5460602A (en) 1989-01-23 1993-03-08 Smoke evacuator for smoke generating devices
US08/027,825 1993-03-08

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WO1994020032A1 true WO1994020032A1 (fr) 1994-09-15

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AU (1) AU6397694A (fr)
WO (1) WO1994020032A1 (fr)

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US8286339B2 (en) 2009-02-18 2012-10-16 Tyco Healthcare Group Lp Two piece tube for suction coagulator
US8328804B2 (en) 2008-07-24 2012-12-11 Covidien Lp Suction coagulator
US8444641B2 (en) 2009-02-18 2013-05-21 Covidien Lp Two piece tube for suction coagulator
US8454600B2 (en) 2009-02-18 2013-06-04 Covidien Lp Two piece tube for suction coagulator
US8460291B2 (en) 2009-02-18 2013-06-11 Covidien Lp Two piece tube for suction coagulator
US8753341B2 (en) 2009-06-19 2014-06-17 Covidien Lp Thermal barrier for suction coagulator
US8945124B2 (en) 2007-12-05 2015-02-03 Covidien Lp Thermal penetration and arc length controllable electrosurgical pencil
US9198720B2 (en) 2008-03-31 2015-12-01 Covidien Lp Electrosurgical pencil including improved controls
US11564732B2 (en) 2019-12-05 2023-01-31 Covidien Lp Tensioning mechanism for bipolar pencil

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